Lanterna Rally

Author: E. C. Crittenden

Publisher: Forgotten Books

Published: 2017-11-25

Total Pages: 30

ISBN-13: 9780331910032

Excerpt from An "Average Eye" For Heterochromatic Photometry, and a Comparison of a Flicker and an Equality-of-Brightness Photometer All the photometers used had pupil apertures 5 mm in diameter. Each photometer head was provided with holders for absorption glasses, as well as holders for absorption cells, especially con structed to prevent any diffusion of stray light into the photo metric field. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.